public class MyListener {
}
        import javax.servlet.*;
        import javax.servlet.annotation.WebListener;
        import javax.servlet.http.*;
@WebListener
public class MyListener implements ServletContextListener, HttpSessionListener,ServletRequestListener {
    public void contextInitialized(ServletContextEvent arg0){
        System.out.println("ServletContext对象被创建了");
    }
    public void contextDestroyed(ServletContextEvent arg0){
        System.out.println("ServletContext对象被销毁了");
    }
    public void requestInitialized(ServletRequestEvent arg0) {
        System.out.println("ServletRequest对象被创建了");
    }
    public void requestDestroyed(ServletRequestEvent arg0) {
        System.out.println("ServletRequest对象被销毁了");
    }
    public void sessionCreated(HttpSessionEvent arg0) {
        System.out.println("HttpSession对象被创建了");
    }
    public void sessionDestroyed(HttpSessionEvent arg0) {
        System.out.println("HttpSession对象被销毁了");
    }
}
